# EventSource

The `EventSource` class provides methods for monitoring signals.

## Properties

This module exposes no properties.

## Methods

| Method                  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| ----------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `select`                | <p><code>select(property: string): EventSource</code></p><p>Converts event source by selecting a property in the event object. Events without specified property are ignored.</p>                                                                                                                                                                                                                                                                               |
| `skip`                  | <p><code>skip(count: number): EventSource</code></p><p>Yields a filtered event source: the first <code>count</code> events from the original source are dropped, and subsequent ones signaled.</p>                                                                                                                                                                                                                                                              |
| `subscribe`             | <p><code>subscribe(callback: (event: mixed) => void): Subscription</code></p><p>Sets a callback for the event source. The callback will be invoked every time an event is emitted from this <code>EventSource</code>.</p><p><strong>See Also</strong>: <code>Subscription.unsubscribe</code>.</p><p><strong>Note</strong>: <code>subscribe</code> and <code>subscribeOnNext</code> functions are completely equivalent.</p>                                     |
| `subscribeOnNext`       | <p><code>subscribeOnNext(callback: (event: mixed) => void): Subscription</code></p><p>Sets a callback for the event source. The callback will be invoked every time an event is emitted from this <code>EventSource</code>.</p><p><strong>See Also</strong>: <code>Subscription.unsubscribe</code>.</p><p><strong>Note</strong>: <code>subscribe</code> and <code>subscribeOnNext</code> functions are completely equivalent.</p>                               |
| `subscribeWithSnapshot` | <p><code>subscribeWithSnapshot(snapshot: { \[name: string]: Signal}, callback: (event: mixed, snapshot: mixed) => void): Subscription</code></p><p>Sets a callback for the event source, similar to <code>Subscribe</code> function, but with additional <code>Snapshot</code> parameter. <code>Snapshot</code> is a dictionary of String/Bool/Scalar signals, which will be passed as JSON to the callback function using lastValue from requested signals</p> |
| `take`                  | <p><code>take(count: number): EventSource</code></p><p>Yields a filtered event source: the first <code>count</code> events from the original source are signaled, and subsequent ones ignored.</p>                                                                                                                                                                                                                                                              |


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